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  <title>center (string_display_methods.rb)</title>
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  <pre><span class="ruby-comment cmt"># File string_display_methods.rb, line 17</span>
<span class="ruby-keyword kw">def</span> <span class="ruby-identifier">center</span> <span class="ruby-identifier">str</span>,<span class="ruby-identifier">len</span>,<span class="ruby-identifier">space</span> = <span class="ruby-value str">&quot; &quot;</span>
  <span class="ruby-keyword kw">if</span> <span class="ruby-identifier">str</span>.<span class="ruby-identifier">length</span> <span class="ruby-operator">&gt;</span> <span class="ruby-identifier">len</span>
    <span class="ruby-identifier">str</span> = <span class="ruby-identifier">str</span>[<span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-identifier">len</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>]
  <span class="ruby-keyword kw">end</span>
  <span class="ruby-identifier">llen</span>=<span class="ruby-identifier">len</span><span class="ruby-operator">/</span><span class="ruby-value">2</span>
  <span class="ruby-identifier">rlen</span> = <span class="ruby-identifier">len</span><span class="ruby-operator">-</span><span class="ruby-identifier">llen</span>
  <span class="ruby-identifier">cent</span> = ((<span class="ruby-identifier">str</span>.<span class="ruby-identifier">length</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>)<span class="ruby-operator">/</span><span class="ruby-value">2</span>)
  <span class="ruby-identifier">left</span> = <span class="ruby-identifier">str</span>[<span class="ruby-value">0</span><span class="ruby-operator">..</span><span class="ruby-identifier">cent</span>]
  <span class="ruby-identifier">right</span> = <span class="ruby-identifier">str</span>[<span class="ruby-identifier">cent</span><span class="ruby-operator">+</span><span class="ruby-value">1</span><span class="ruby-operator">..</span><span class="ruby-identifier">str</span>.<span class="ruby-identifier">length</span><span class="ruby-operator">-</span><span class="ruby-value">1</span>] 
  <span class="ruby-identifier">rjust</span>(<span class="ruby-identifier">left</span>,<span class="ruby-identifier">llen</span>,<span class="ruby-identifier">space</span>)<span class="ruby-operator">+</span><span class="ruby-identifier">ljust</span>(<span class="ruby-identifier">right</span>,<span class="ruby-identifier">rlen</span>,<span class="ruby-identifier">space</span>)
<span class="ruby-keyword kw">end</span></pre>
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